Friday, August 18, 2006

Ozone Layer

There are two things I haven't heard about lately - the ozone layer and acid rain.

Does this mean they are not still problems - or are they still severe problems and other stories have bumped them from the media?

As I was thinking of this the last few days I came across this story about UNEP and the Montreal Protocal which set out to reduce harmful CFC's, HCFC's and other mean yucky substances we can spew into the atmosphere.

http://www.unep.org/Documents.Multilingual/Default.asp?DocumentID=484&ArticleID=5335&l=en

So the ozone hole will still appear every season (August, peaking in September) and it will for many years to come - but there has been some minor improvement!!

So we (and governments) actually *can* do something!

Here are the projections :

"According to the “UNEP/WMO Scientific Assessment of Ozone Depletion: 2006”, the updated scientific understanding indicates that the ozone layer over the mid-latitudes (30° - 60° North and South) should recover by 2049, five years later than anticipated by the previous (2002) assessment.
The ozone over the Antarctic should recover by 2065, 15 years later than once expected. Because of special conditions within the Antarctic vortex (a natural cyclone of super-cold, super-fast winds), the Antarctic ozone “hole” is expected to recur regularly for another two decades. "

Are we doing enough?

2 Comments:

At 4:26 PM, Blogger Phil Plasma said...

It was during the Reagan era that things changed for the better, so we've had a good 20-30 years of time since a decision was made to make a change. That kind of lag time means that any effort reduce GHG emissions means we're too late to recover. Fun!

 
At 10:50 AM, Blogger Mercenaria said...

Absolutely!

And in great horror I subsequently read something about the effects of the cheap replacements to CFC's on the environment.

*sigh*

Well it could be worse!

 

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